Sidetracking Horizontal Drilling Technology in Well DB2-E5 of Dongpang Coal Mine

Abstract:

DB2-E5 is the first sidetracking horizontal well for grouting in Dongpang. This paper analyzes the drilling difficulties, presents the well structure desigh and branch well design trajectory and introduces the real drilling technical measures and DHA as well as drilling parameters in detail. The successful completion of this well is of great significance for Ordovician grouting, waterproofing, water control and drilling cost reduction.